Command line interface tool for Gaia

I’ve written a little command line tool for interacting with Gaia, which is the front-end for Firefox OS. The main reason for this is the Eideticker CI project needed a way to connect to a WiFi network before running the tests. In the past, we’ve allowed tools to accept test variables, which contain the necessary information for connecting to a network, but rather than add this into Eideticker, it’s easier to just take care of it in an earlier build step.